Poikilocytosis refers to the presence of poikilocytes in the blood.

异形红细胞症是指血液中出现变异体细胞。

youdao

An HIV test reveals infection status by detecting the presence or absence of antibodies to HIV in the blood.

艾滋病毒检测通过检查血液中是否存在艾滋病毒抗体，显示感染状况。

youdao

The chemical Luminol is used at crime scenes because it fluoresces in the presence of blood.

化学物质鲁米诺应用在犯罪现场中，因为它在血液中发荧光。

youdao

Of the blood that has to be destroyed, almost half is caused by the presence of Hepatitis B, Hepatitis C,and syphilis, while the other half is due to problems in the collection process.

VOA: standard.2010.06.04